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Author SHA1 Message Date
Jonathan Westhues ee6939a761 Output rational b-spline curves and surfaces in the STEP file, and 
make sure that our edge loops are exactly (considering only the
vertex id) closed.

[git-p4: depot-paths = "//depot/solvespace/": change = 1976]
 2009-06-08 18:04:15 -08:00
Jonathan Westhues 603f47692e When exporting STEP, identify the outer contours, and group them 
and their holes into their own advanced faces. So a single surface
with multiple outer contours generates multiple advanced faces.

Also turn the default chord tol down to 1.5 pixels, seems more
likely to make the exact surface Booleans work.

[git-p4: depot-paths = "//depot/solvespace/": change = 1975]
 2009-06-08 08:21:33 -08:00
Jonathan Westhues 9455037e49 Add beginnings of STEP export, which weren't as horrible as I had 
feared. Though I don't have rational surfaces or curves going yet,
and I don't have the stuff to handle holes or multiple outer
contours in a single surface.

[git-p4: depot-paths = "//depot/solvespace/": change = 1974]
 2009-06-07 22:50:16 -08:00